Tool maker&#39;s square



April 14, 1959 J. o. GIRARD TOOL MAKER'S SQUARE? Filed March 7, 1958 JOSa DAUZzzrer INVENTOR ATTORNEYS United States Patent TOOL MAKERS SQUARE Joseph Oliver Girard, Boyne City, Mich. Application March 7, 1958, Serial No. 719,819

4 Claims. (Cl. 33-112) This invention relates to a tool makers square, and has as its primary object the provision of an improved square of improved accuracy.

An additional object of the invention is the provision of a square of this character including a blade in a base, having means whereby the angularity of the blade relative to the base may be adjusted, either during or after manufacture and assembly to a point of substantially exact accuracy.

An additional object of the invention is the provision of such a device having means whereby the angularity of the blade relative to the base may be adjusted in a direction transverse to the width of the blade, as well as angularly relative to the base in the plane of the blade and base.

A further object of the invention is the provision of such a device which may be readily disassembled for adjustment, but which when in adjusted position is maintained securely in the desired position of adjustment.

Still other objects reside in the combinations of elements, arrangements of parts, and features of construction, all as will be more fully pointed out hereinafter, and disclosed in the accompanying drawing wherein there is shown a preferred embodiment of this inventive concept.

Other objects will in part be obvious and in part be pointed out hereinafter.

In the drawing:

Figure 1 is a top plan view of one form of tool makers square embodying features of the instant invention, certain concealed parts being shown in dotted lines.

Figure 2 is an end elevational view of the square of Figure 1 as view from the right, parts thereof being shown in section, and additional concealed parts being indicated in dotted lines.

Figure 3 is a bottom plan view of the top or movable section of the base.

Figure 4 is a top plan view of the opposed or bottom section of the base.

Figure 5 is a sectional view taken substantially along the line 5-5 of Figure 1 as viewed in the direction indicated by the arrows.

Figure 6 is a sectional view taken substantially along the line 6-6 of Figure 4 as viewed in the direction indicated by the arrows.

Figure 7 is a plan view of the blade removed from the base.

Figure 8 is a sectional view taken substantially along the line 8-8 of Figure 7 as viewed in the direction indicated by the arrows.

Similar reference characters refer to similar parts throughout the several views of the drawings.

Having reference now to the drawings in detail, there is generally indicated at 10 a square constructed in accordance with the instant invention, which includes a blade generally indicated at 11, and a base generally indicated at 12, to which the blade is adapted to be secured.

The blade 11 is accurately machined to provide a rectangular body portion 13 with true parallel longitudinal edges 14, and the accurate machine rectangular configuration extends to a point adjacent the inner end of the 2,881,526 Patented Apr. 14, 1959 blade at its juncture with the base. At this point the blade is tapered toward the top thereof from opposite sides as indicated at 16, leaving a substantially rectangular lower portion 17. A pair of elongated slotted apertures 18 are formed in the tapered portion of the blade, as best shown in Fig. 7.

Suitable indicia may be applied to the portion 13 of the blade if desired.

The base of the blade is comprised of two separable halves 20 and 21, which are adapted to be secured together in a manner to be more fully described hereinafter, and, although the square may obviously be used with either side up as well as in other positions of adjustment, for convenience and description the section 20 will hereinafter he referred to as the lower section, and the portion 21 as the upper section.

The lower section 20 is provided with a transverse shoulder 22, which is angularly disposed relative to the top edge 23 of the section 20, the angularity of the shoulder 22 being in the order of 10 degrees. A suitable notch 24 is cut into one side wall 25 of the section 20, at a point immediately adjacent its juncture with the blade portion 13. The portion of member 20 above the shoulder 22 is inclined inwardly as shown at 26 (see Fig. 6), to accommodate the tapered portion 16 of blade 11.

In the tapered portion 26 there are provided a pair of spaced horizontally aligned holes 27, the term horizontal being employed in conjunction with the showing of Figure 4, and in the portion 28 below the shoulder 22 there are provided three vertically aligned 'holes 30. The portion below the shoulder 22 is also divided into a relatively thick section 20a and a reduced section 20bwith a shoulder 32 provided therebetween, the shoulder 32 being angularly disposed in converging relation between the uppermost hole between the uppermost and lowermost of holes 30 and the center hole 30a, as best shown in Figure 4, this to allow angular displacement of the upper member 21 relative to the lower section 20 in a manner and for a purpose to be described hereinafter. The holes 30 and 36a are preferably threaded as indicated at 33 in Fig. 2.

Referring now to the upper section 21 of the base 12 there is provided a shoulder 35, of an angularity corre sponding to the shoulder 22, at the inner or upper end of which there is provided a notch 36, adapted to be aligned with the notch 24, when the base sections 20 and 21 are superposed one upon the other.

The portion of upper member 21 below the shoulder 35 is also divided by means of a shoulder 37 into a relatively thick portion 38 and a reduced portion 38', the shoulder 37 being substantially centered and forming a straight line parallel to the side edges of the base section 21, as best shown in Figure 3. Horizontally aligned holes 38" are positioned in the portion above the shoulder 35, which is oppositely tapered in a manner similar to the portion 26 of lower section 20, and are adapted to be aligned, when the device is assembled with the base 27. Vertically aligned holes 39 are adapted to be aligned with the holes 30 and 30a are also provided centrally of the shoulder 37. The holes 38" and 39 are of slightly larger diameter than the threaded holes 27, 30 and 30a, and as shown in Figures 1 and 2 are provided with counter sunk portions 40 and 41 respectively, which are adapted to accommodate the heads 42 and 43 of Allen head screws 44 and 45 respectively which in turn engage respectively in the threaded bores 27 and 33. When the screws 44 and 45 are tightened, obviously the upper and lower sections 20 and 21 are secured together firmly in a desired position of adjustment, and the blade 11 is securely clamped between the tapered portions 26 and the opposite tapered portion of the section 21. The arrangement of the shoulders 32 and 37 are best shown in Figure 5.

When the upper section 21 is reversed over the lower section 20 the partsassume therelationship as disclosed in Figure l with the notches 36 and 24 being in alignment adjacent the juncture of the blade 11 with the base 10. The shoulders 22=and 35 are disposed in opposed angular relationship, as indicated by dotted lines in Fig. l, and it will be readily apparent that by suitable adjustmeutof thescrews 44 and 45, the blade 11 may be adjusted at substantially an exact: right angle to the edge of the base.

Obviously the taper 16 of blade 11 in the channel formed by the portion 26 and its corresponding tapered portion of member 21 permits adjustment of the blade in a plane perpendicular to the plane of the blade, while the shoulders 22 and 35 similarly as above stated, permit the substantially exact alignment of blade 11 in right angular relation to the corresponding edge of base 12. Theangularity of the shoulder 32-, when opposed to the shoulder 37 provides a dust space 50 (see Fig. 5 between the sections 20 and 21, so that any d ust which may enter between the sections of the base will not occasion disalignment of' the blade relative thereto.

From the foregoing it will now be seen thatthere is herein provided an improved tool makers square which accomplishes all of the objects of this invention, and others, including many advantages of great practical utility and commercial importance.

As many embodiments may be made of this inventive concept, and asmany modifications may be made in the embodiment hereinbefore shown and described, it is to be understood that all matter herein is. to be interpreted merely as illustrative, and not in a limiting sense.

What is claimed is:

1. In a tool makers square, in combination, a blade, said blade being rectangular in cross section throughout the major portion of its length but having a transversely tapered end portion, said end portion having elongated slots therein, and a base portion adapted to be disposed at right angles to said blade, said base comprising two opposed sections, each section having a transverse shoulder adjacent its top portion against which an edge of the blade is adapted to seat, said shoulders being oppositely angularly inclined to permit limited angular adjustment of said blade, aligned apertures in said opposed section aligned with said elongated slots and clamping screws extending through said aligned. apertures and said slots.

2. In a tool makers square, in combination, a blade, said blade being rectangular in cross section throughout the major portion of its length but having a transversely tapered end portion, said end portion having elongated slots therein, and a base portion adapted to be disposed at right angles to said blade, said base comprising two opposed sections, each section having a transverse shoulder adjacent its top portion against which an. edge of the blade is adapted to seat, said shoulders being oppositely angularly inclined to permit limited angular adjustment of said blade, aligned apertures in said opposed section aligned with said elongated slots and clamping screws extending through said aligned apertures and said slots, the portion of said base sections above said sections being tapered to conform to the taper of said tapered end portion of said blade.

3. The structure of claim 2 wherein said opposed sections are provided with second confronting shoulders extending in a direction substantially perpendicular to said transverse shoulders.

4. The structureof claim 3 wherein one of said last mentioned shoulders is in the shape of a shallow V to provide a dust accumulation space.

No references cited. 

